1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright 2014 IBM Corp.
4 */
5
6 #include <linux/debugfs.h>
7 #include <linux/kernel.h>
8 #include <linux/slab.h>
9
10 #include "cxl.h"
11
12 static struct dentry *cxl_debugfs;
13
14 /* Helpers to export CXL mmaped IO registers via debugfs */
debugfs_io_u64_get(void * data,u64 * val)15 static int debugfs_io_u64_get(void *data, u64 *val)
16 {
17 *val = in_be64((u64 __iomem *)data);
18 return 0;
19 }
20
debugfs_io_u64_set(void * data,u64 val)21 static int debugfs_io_u64_set(void *data, u64 val)
22 {
23 out_be64((u64 __iomem *)data, val);
24 return 0;
25 }
26 DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set,
27 "0x%016llx\n");
28
debugfs_create_io_x64(const char * name,umode_t mode,struct dentry * parent,u64 __iomem * value)29 static void debugfs_create_io_x64(const char *name, umode_t mode,
30 struct dentry *parent, u64 __iomem *value)
31 {
32 debugfs_create_file_unsafe(name, mode, parent, (void __force *)value,
33 &fops_io_x64);
34 }
35
cxl_debugfs_add_adapter_regs_psl9(struct cxl * adapter,struct dentry * dir)36 void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir)
37 {
38 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1));
39 debugfs_create_io_x64("fir_mask", 0400, dir,
40 _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK));
41 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL));
42 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG));
43 debugfs_create_io_x64("debug", 0600, dir,
44 _cxl_p1_addr(adapter, CXL_PSL9_DEBUG));
45 debugfs_create_io_x64("xsl-debug", 0600, dir,
46 _cxl_p1_addr(adapter, CXL_XSL9_DBG));
47 }
48
cxl_debugfs_add_adapter_regs_psl8(struct cxl * adapter,struct dentry * dir)49 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir)
50 {
51 debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR1));
52 debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR2));
53 debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_FIR_CNTL));
54 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE));
55 }
56
cxl_debugfs_adapter_add(struct cxl * adapter)57 void cxl_debugfs_adapter_add(struct cxl *adapter)
58 {
59 struct dentry *dir;
60 char buf[32];
61
62 if (!cxl_debugfs)
63 return;
64
65 snprintf(buf, 32, "card%i", adapter->adapter_num);
66 dir = debugfs_create_dir(buf, cxl_debugfs);
67 adapter->debugfs = dir;
68
69 debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE));
70
71 if (adapter->native->sl_ops->debugfs_add_adapter_regs)
72 adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir);
73 }
74
cxl_debugfs_adapter_remove(struct cxl * adapter)75 void cxl_debugfs_adapter_remove(struct cxl *adapter)
76 {
77 debugfs_remove_recursive(adapter->debugfs);
78 }
79
cxl_debugfs_add_afu_regs_psl9(struct cxl_afu * afu,struct dentry * dir)80 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir)
81 {
82 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
83 }
84
cxl_debugfs_add_afu_regs_psl8(struct cxl_afu * afu,struct dentry * dir)85 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
86 {
87 debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
88 debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
89
90 debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
91 debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
92 debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
93 debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE));
94 }
95
cxl_debugfs_afu_add(struct cxl_afu * afu)96 void cxl_debugfs_afu_add(struct cxl_afu *afu)
97 {
98 struct dentry *dir;
99 char buf[32];
100
101 if (!afu->adapter->debugfs)
102 return;
103
104 snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice);
105 dir = debugfs_create_dir(buf, afu->adapter->debugfs);
106 afu->debugfs = dir;
107
108 debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
109 debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
110 debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
111
112 debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
113
114 if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
115 afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir);
116 }
117
cxl_debugfs_afu_remove(struct cxl_afu * afu)118 void cxl_debugfs_afu_remove(struct cxl_afu *afu)
119 {
120 debugfs_remove_recursive(afu->debugfs);
121 }
122
cxl_debugfs_init(void)123 void __init cxl_debugfs_init(void)
124 {
125 if (!cpu_has_feature(CPU_FTR_HVMODE))
126 return;
127
128 cxl_debugfs = debugfs_create_dir("cxl", NULL);
129 }
130
cxl_debugfs_exit(void)131 void cxl_debugfs_exit(void)
132 {
133 debugfs_remove_recursive(cxl_debugfs);
134 }
135
